Version is not set by default (value will be based in platform.linux_distribution function)

New key to define computer name (if not set, value will be based in platform.node function)
New key computer_name readed in _read_conf_file method

hostname value changed in _eval_attributes method to new value computer_name
Changed get_hostname (only returns hostname, without domain)

Changed get_mfc_version (if not set in .conf, returns value based in platform.linux_distribution function)
Changed migas_version getting method in _read_conf_file (utils.get_mfc_version)